Catalytic proppant and methods for making and using same

ABSTRACT

A catalytic proppant and methods for making and using same are disclosed herein. The catalytic proppant can include a proppant support containing silica and alumina. The proppant support can have a macropore concentration of about 15% to about 45%, a mesopore concentration of about 20% to 50%, and a micropore concentration of about 8% to about 30% based on the total pore volume of the proppant support. The proppant support can also have a surface area of about 0.5 m2/g to about 50 m2/g. The catalytic proppant can have a long term permeability at 7,500 psi of at least about 10 D in accordance with ISO 13503-5.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims benefit of U.S. Provisional Patent ApplicationSer. No. 62/471,628, filed Mar. 15, 2017, which is herein incorporatedby reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to proppant containing catalystfunctionality to improve the production rates and ultimate recovery ofdesirable products from an oil or gas well.

BACKGROUND

Oil and natural gas are produced from wells having porous and permeablesubterranean formations. The porosity of the formation permits theformation to store oil and gas, and the permeability of the formationpermits the oil or gas fluid to move through the formation. Permeabilityof the formation is essential to permit oil and gas to flow to alocation where it can be pumped from the well. Sometimes the oil or gasis held in a formation having insufficient permeability for economicrecovery of the oil and gas. In other cases, during operation of thewell, the permeability of the formation drops to the extent that furtherrecovery becomes uneconomical. In such cases, it is necessary tofracture the formation and prop the fracture in an open condition bymeans of a proppant material or propping agent. Such fracturing isusually accomplished by hydraulic pressure, and the proppant material orpropping agent is a particulate material, such as sand, glass beads orceramic particles, which are carried into the fracture by means of afluid.

Subterranean formations oftentimes contain petroleum compositions thatcan reduce production and consequently reduce estimated ultimaterecovery (EUR) of a well. These petroleum compositions can be difficultor impossible to recover due to their relatively high densities orviscosities, which oftentimes require application of heat energy or CO₂gas pressure for their production. Also, oil and gas produced from wellscan oftentimes include undesirable heteroatoms, such as sulfur ornitrogen, which are typically removed via a downstream surface facility,for example a refinery. The presence of such heteroatoms increases thecost of oil and gas produced from a well due to the necessity of furtherdownstream refining. It would be desirable to increase the market valueof hydrocarbons produced from a well and to increase the well's EUR.

Therefore, what is needed is a method to reduce the densities andviscosities of certain petroleum compositions to improve an estimatedultimate recovery of a well. Also, what is needed is a method to removeheteroatom contamination from oil and gas prior to its production at thesurface.

SUMMARY

In one embodiment, a catalytic proppant particle includes a proppantsupport comprising silica and alumina. The proppant support has: amacropore concentration of about 15% to about 45%, a mesoporeconcentration of about 20% to 50%, and a micropore concentration ofabout 8% to about 30% based on the total pore volume of the proppantsupport. The proppant support has a surface area of about 0.5 m²/g toabout 50 m²/g. The catalytic proppant particle further includes acatalyst.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure may best be understood by referring to thefollowing description and accompanying drawings that are used toillustrate embodiments of the present disclosure. In the drawings:

The FIGURE is a schematic cross-sectional illustration of a wellcontaining two hydraulically-induced fractures, each containingcatalytic proppant, according to one or more exemplary embodiments.

DETAILED DESCRIPTION

In the following description, numerous specific details are set forth.However, it is understood that embodiments of the present disclosure maybe practiced without these specific details. In other instances,well-known structures and techniques have not been shown or described indetail in order not to obscure the understanding of this description.Additionally, as used herein, the term “exemplary” is intended to meanserving as an illustration or example, and is not intended to indicate apreference.

Embodiments of the present disclosure include catalytic proppant havinga proppant support, such as silica or alumina, and one or more catalystsdisposed on, attached to, coated on, infused/impregnated into, combinedwith, or otherwise contained on or in the proppant support. Embodimentsof the present disclosure further include downhole catalytic refiningprocesses utilizing catalytic proppant. The downhole catalytic refiningprocesses can include hydroprocessing, hydrotreating, hydrocracking,hydrogenation, hydroisomerization, hydrorefining, hydrodemetallization,catalytic cracking, reforming reactions, shift reactions, dehydration,and dehydrogenation. The catalytic refining process can occur or operatein downhole conditions. In the case of hydroprocessing, hydrotreating,hydrocracking, hydrogenation, hydroisomerization, hydrorefining,hydrodemetallization, reforming reactions, hydrogen can be produceddownhole from the catalytic proppant and/or the hydrogen can be injecteddownhole from the surface. For example, hydrogen can be produced at thesurface of catalytically-active proppant via a steam reforming reactionand then can diffuse into neighboring trapped hydrocarbons to beutilized in a hydrocracking reaction with higher molecular weighthydrocarbon compounds. Hydrocracking downhole can lower the viscosity ofthe produced fluid, thereby increasing productivity of the wellbore.Similarly, hydrogen can react with heteroatom-containing hydrocarbons toprovide volatile heteroatom-containing compounds such as H₂S, H₂O, NH₃,NO, NO₂, SO₂, etc. and a refined hydrocarbon composition. The producedrefined hydrocarbon compositions can have a reduced sulfur content, areduced nitrogen content, and/or a reduced metals content when comparedto the hydrocarbons contained in the formation. In one or more exemplaryembodiments, hydrogen produced downhole by the catalytic proppant can becollected and purified.

The term “apparent specific gravity,” as used herein, is the weight perunit volume (grams per cubic centimeter) of the particles, including theinternal porosity. The apparent specific gravity values given hereinwere determined by the Archimedes method of liquid (water) displacementaccording to API RP60, a method which is well known to those of ordinaryskill in the art. For purposes of this disclosure, methods of testingthe characteristics of the proppant in terms of apparent specificgravity are the standard API tests that are routinely performed onproppant samples.

The term “conductivity,” as used herein, is defined as the product ofthe width of the created fracture and the permeability of the proppantthat remains in the fracture.

The term “internal interconnected porosity,” as used herein, is definedas a percentage of the pore volume, or void volume space, over the totalvolume of a porous ceramic particulate.

The term “degradable,” as used herein, means the ability of a chemicalor coating to react to dissolve or breakdown into smaller componentsunder one or more downhole conditions.

The term “infuse,” as used herein, means to inject, attach, introduce,or otherwise include a material into a porous substrate, such as aporous ceramic.

The term “ceramic,” as used herein, means any non-metallic, inorganicsolid material.

The term “ceramic proppant,” as used herein, means any man-made orsynthetic ceramic particulate(s).

The term “catalyst” or “catalytic material,” as used herein, means anyorganic, inorganic, or metal material, or composites, or alloys of thelike, that increases the rate of chemical reactions without undergoing apermanent chemical change after a chemical reaction is complete.

The term “proppant,” as used herein, means material that includes one ormore (e.g., tens, hundreds, thousands, millions, or more) of individualproppant particulates or elements, such as grains of sand or ceramicproppant particulates. The terms “particle” and “particulate” are usedinterchangeably.

The term “proppant support” as used herein includes a porous ornon-porous material configured to support a catalyst on the supportsurface and/or within pores of the support material.

A proppant particulate containing catalytic functionality for use inhydraulic fracturing is disclosed. The catalytic functionality can besupplied by a proppant support, a catalytic material added to theproppant support, or both. For example, catalytic material can bedisposed on, attached to, coated on, infused into, combined with, orotherwise contained on or in the proppant support to produce theproppant containing the catalytic functionality, also referred to ascatalytic proppant.

The proppant support can be a ceramic proppant support manufacturedaccording to any suitable process including, but not limited tocontinuous spray atomization, spray fluidization, drip casting, spraydrying, or compression. Suitable proppant particulates and methods formanufacture are disclosed in U.S. Pat. Nos. 4,068,718, 4,427,068,4,440,866, 5,188,175, 7,036,591, 8,865,631, 8,883,693, 9,175,210, and9,670,400 and U.S. Pre-Grant Publication No. US 2016/0017214, the entiredisclosures of which are incorporated herein by reference.

According to several exemplary embodiments, the proppant supportsdisclosed herein include proppant particulates that are substantiallyround and spherical having a size in a range between about 6 and 270U.S. Mesh. For example, the size of the particulate can be expressed asa grain fineness number (GFN) in a range of from about 15 to about 300,or from about 30 to about 110, or from about 40 to about 70. Accordingto such examples, a sample of sintered particles can be screened in alaboratory for separation by size, for example, intermediate sizesbetween 20, 30, 40, 50, 70, 100, 140, 200, and 270 U.S. mesh sizes todetermine GFN. The correlation between sieve size and GFN can bedetermined according to Procedure 106-87-S of the American FoundrySociety Mold and Core Test Handbook, which is known to those of ordinaryskill in the art.

The proppant supports disclosed herein can have any suitable size. Forexample, the proppant support can have a mesh size of at least about 6mesh, at least about 10 mesh, at least about 16 mesh, at least about 20mesh, at least about 25 mesh, at least about 30 mesh, at least about 35mesh, or at least about 40 mesh. According to several exemplaryembodiments, the proppant support can have a mesh size from about 6mesh, about 10 mesh, about 16 mesh, or about 20 mesh to about 25 mesh,about 30 mesh, about 35 mesh, about 40 mesh, about 45 mesh, about 50mesh, about 70 mesh, or about 100 mesh. According to several exemplaryembodiments, the proppant support can have a mesh size from about 4 meshto about 120 mesh, from about 10 mesh to about 60 mesh, from about 16mesh to about 20 mesh, from about 20 mesh to about 40 mesh, or fromabout 25 mesh to about 35 mesh.

According to several exemplary embodiments, the proppant supportsdisclosed herein can include porous and/or non-porous proppantparticulates having any suitable permeability and conductivity inaccordance with ISO 13503-5: “Procedures for Measuring the Long-termConductivity of Proppants,” and expressed in terms of Darcy units, orDarcies (D). A pack of the proppant supports, having a 20/40 mesh sizerange, can have a long term permeability at 7,500 psi of at least about1 D, at least about 2 D, at least about 5 D, at least about 10 D, atleast about 20 D, at least about 40 D, at least about 80 D, at leastabout 120 D, at least about 150 D, at least about 200 D, or at leastabout 250 D. The pack of the proppant supports, having a 20/40 mesh sizerange, can have a long term permeability at 12,000 psi of at least about1 D, at least about 2 D, at least about 3 D, at least about 4 D, atleast about 5 D, at least about 10 D, at least about 25 D, at leastabout 50 D, at least about 100 D, at least about 150 D, or at leastabout 200 D. The pack of the proppant supports, having a 20/40 mesh sizerange, can have a long term permeability at 15,000 psi of at least about1 D, at least about 2 D, at least about 3 D, at least about 4 D, atleast about 5 D, at least about 10 D, at least about 25 D, at leastabout 50 D, at least about 75 D, at least about 100 D, or at least about150 D. The pack of the proppant supports, having a 20/40 mesh sizerange, can have a long term permeability at 20,000 psi of at least about1 D, at least about 2 D, at least about 3 D, at least about 4 D, atleast about 5 D, at least about 10 D, at least about 25 D, at leastabout 50 D, at least about 75 D, or at least about 100 D.

A pack of the proppant supports can have a long term fluid conductivityat 7,500 psi of at least about 100 millidarcy-feet (mD-ft), at leastabout 200 mD-ft, at least about 300 mD-ft, at least about 500 mD-ft, atleast about 1,000 mD-ft, at least about 1,500 mD-ft, at least about2,000 mD-ft, or at least about 2,500 mD-ft. For example, a pack of theproppant supports can have a long term conductivity at 12,000 psi of atleast about 50 mD-ft, at least about 100 mD-ft, at least about 200mD-ft, at least about 300 mD-ft, at least about 500 mD-ft, at leastabout 1,000 mD-ft, or at least about 1,500 mD-ft.

The proppant supports can have any suitable shape. The proppant supportscan be substantially round, cylindrical, square, rectangular,elliptical, oval, egg-shaped, or pill-shaped. According to severalexemplary embodiments, the proppant supports can have an apparentspecific gravity of less than about 4, less than about 3.5, less thanabout 3.0, less than about 2.8, or less than about 2.5. According toseveral exemplary embodiments, the proppant supports have an apparentspecific gravity of from about 2.5 to about 4.0, from about 3.1 to 3.4,from about 1.5 to about 2.2, from about 1.9 to about 2.5, or from about2.6 to about 3.2. According to several exemplary embodiments, theproppant supports have an apparent specific gravity of greater thanabout 3.4, greater than about 3.6, greater than about 4.0, or greaterthan about 4.5.

The proppant support can have any suitable density. In one or moreexemplary embodiments, the proppant support has a density of less thanabout 4 g/cc, less than about 3.5 g/cc, less than about 3 g/cc, lessthan about 2.75 g/cc, less than about 2.5 g/cc, less than about 2.25g/cc, less than about 2 g/cc, less than about 1.75 g/cc, or less thanabout 1.5 g/cc. For example, the proppant support can have a density ofabout 1.3 g/cc to about 3.5 g/cc, about 1.5 g/cc to about 3.2 g/cc,about 1.7 g/cc to about 2.7 g/cc, about 1.8 g/cc to about 2.4 g/cc, orabout 2.0 g/cc to about 2.3 g/cc.

The proppant supports can have any suitable bulk density. In one or moreexemplary embodiments, the proppant supports have a bulk density of lessthan 3 g/cc, less than 2.5 g/cc, less than 2.2 g/cc, less than 2 g/cc,less than 1.8 g/cc, less than 1.6 g/cc, or less than 1.5 g/cc. Theproppant supports can have a bulk density of about 1 g/cc, about 1.15g/cc, about 1.25 g/cc, about 1.35 g/cc, or about 1.45 g/cc to about 1.5g/cc, about 1.6 g/cc, about 1.75 g/cc, about 1.9 g/cc, or about 2.1 g/ccor more. For example, the proppant supports can have a bulk density ofabout 1.3 g/cc to about 1.8 g/cc, about 1.35 g/cc to about 1.65 g/cc, orabout 1.5 g/cc to about 1.9 g/cc.

The proppant supports can have any suitable surface roughness. Theproppant supports can have a surface roughness of less than about 5 μm,less than about 4 μm, less than about 3 μm, less than about 2.5 μm, lessthan about 2 μm, less than about 1.5 μm, or less than about 1 μm. Forexample, the proppant supports can have a surface roughness of about 0.1μm to about 4.5 μm, such as about 0.4 μm to about 3.5 μm, such as about0.8 μm to about 2.8 μm.

The proppant supports can have any suitable pore size distribution. Forexample, the proppant supports can have a standard deviation in poresize of less than about 6 μm, less than about 4 μm, less than about 3μm, less than about 2.5 μm, less than about 2 μm, less than about 1.5μm, or less than about 1 μm. The proppant supports can have any suitableaverage maximum or largest pore size. For example, the proppant supportscan have an average largest pore size of less than about 25 μm, lessthan about 20 μm, less than about 18 μm, less than about 16 μm, lessthan about 14 μm, or less than about 12 μm. The proppant supports canhave any suitable concentration of pores. For example, the proppantsupports can have less than about 5,000, less than about 4,500, lessthan about 4,000, less than about 3,500, less than about 3,000, lessthan about 2,500, or less than about 2,200 visible pores at amagnification of 500× per square millimeter of proppant support.

The proppant support can have any suitable porosity. According toseveral exemplary embodiments, the proppant supports include porousproppant having any suitable porosity. The porous proppant can have aninternal interconnected porosity from about 1%, about 2%, about 4%,about 6%, about 8%, about 10%, about 12%, or about 14% to about 18%,about 20%, about 22%, about 24%, about 26%, about 28%, about 30%, about34%, about 38%, about 45%, about 55%, about 65%, or about 75% or more.In several exemplary embodiments, the internal interconnected porosityof the porous proppant is from about 5% to about 75%, about 5% to about15%, about 10% to about 30%, about 15% to about 35%, about 25% to about45%, about 30% to about 55%, or about 35% to about 70%. According toseveral exemplary embodiments, the porous proppant can have any suitableaverage pore size. For example, the porous proppant can have an averagepore size from about 2 nm, about 10 nm, about 15 nm, about 55 nm, about110 nm, about 520 nm, or about 1,100 to about 2,200 nm, about 5,500 nm,about 11,000 nm, about 17,000 nm, or about 25,000 nm or more in itslargest dimension. For example, the porous proppant can have an averagepore size from about 3 nm to about 30,000 nm, about 30 nm to about18,000 nm, about 200 nm to about 9,000 nm, about 350 nm to about 4,500nm, or about 850 nm to about 1,800 nm in its largest dimension.

The proppant support can include silica and/or alumina in any suitableamounts. According to several exemplary embodiments, the proppantsupport can include greater than about 0.1 wt % silica and less thanabout 80 wt %, less than about 60 wt %, less than about 40 wt %, lessthan about 30 wt %, less than about 20 wt %, less than about 10 wt %, orless than about 5 wt % silica based on the weight of the proppantsupport. According to several exemplary embodiments, the proppantsupport can include from about 0.1 wt % to about 70 wt % silica, fromabout 1 wt % to about 60 wt % silica, from about 2.5 wt % to about 50 wt% silica, from about 5 wt % to about 40 wt % silica, or from about 10 wt% to about 30 wt % silica. According to several exemplary embodiments,the proppant support can include at least about 30 wt %, at least about50 wt %, at least about 60 wt %, at least about 70 wt %, at least about80 wt %, at least about 90 wt %, or at least about 95 wt % alumina basedon the weight of the proppant support. According to several exemplaryembodiments, the proppant support can include from about 30 wt % toabout 99.9 wt % alumina, from about 40 wt % to about 99 wt % alumina,from about 50 wt % to about 97 wt % alumina, from about 60 wt % to about95 wt % alumina, or from about 70 wt % to about 90 wt % alumina. Theproppant support can have any suitable silica to alumina ratio. Forexample, the proppant support can have a silica to alumina ratio fromabout 0.1:1 to about 5:1, about 0.3:1 to about 3:1, about 0.4:1 to about2:1, about 0.5:1 to about 1.5:1, about 0.8:1 to about 1.2:1, or about0.9:1 to about 1.1:1.

The proppant support can have any suitable distribution of macropores,mesopores, and micropores. In one or more exemplary embodiments, theproppant support can have a macropore concentration of from about 15% toabout 50%, about 20% to about 45%, about 25% to about 40%, about 30% toabout 35% based on the total pore volume of the proppant support. Asused herein, the term “macropore” means a pore having a diameter ofgreater than 80 nm, as measured in accordance with ASTM D 4284-03. Inone or more exemplary embodiments, the proppant support can have amesopore concentration of from about 20% to about 70%, about 25% toabout 60%, about 30% to about 50%, about 35%, to about 40% based on thetotal pore volume of the proppant support. As used herein, the term“mesopore” means a pore having a diameter from greater than 20 nm to 80nm, as measured in accordance with ASTM D 4284-03. In one or moreexemplary embodiments, the proppant support can have a microporeconcentration of about 8% to about 30%, about 12% to about 25%, about14% to about 22%, about 18% to about 20% based on the total pore volumeof the proppant support. As used herein, the term “micropore” means apore having a diameter of 20 nm or less, as measured in accordance withASTM D 4284-03.

The proppant support can have any suitable surface area. In one or moreexemplary embodiments, the proppant support has a surface area of about0.5 m²/g to about 50 m²/g or more, about 1 m²/g to about 25 m²/g, about2 m²/g to about 20 m²/g, about 5 m²/g to about 16 m²/g, about 8 m²/g toabout 12 m²/g, such as about 10 m²/g. Any one or more of the abovecharacteristics for the proppant support can provide at least some levelof catalytic activity, depending on the fluid(s) and conditions presentdownhole.

While the proppant support can have at least some level of catalyticfunctionality, the catalytic proppant can also contain any suitablematerial that can impart catalyst functionality to the proppant supportor otherwise increase catalyst functionality of the proppant support.Materials suitable for providing catalytic functionality include highsurface area zeolites, modified zeolites, and/or catalytically activechemical chemicals, or catalytic metals, collectively “catalyticcompounds.” The catalytic metals can include elemental metals, metalalloys and metal compounds such as metal sulfides, metal oxides, metalnitrides, and metal phosphides. Catalytically active chemical compoundscan include suitable metal organics, organometallics, organic catalysts,and biomolecular catalysts.

In one or more exemplary embodiments, the catalytic proppant can includeone or more catalytic metals, including catalytic metal compounds. Thecatalytic metals can include any one or more of the elements selectedfrom Groups 4-10 of the IUPAC Periodic Table. For example, the catalyticmetals can include titanium, zirconium, vanadium, niobium, tantalum,chromium, molybdenum, tungsten, manganese, rhenium, iron, cobalt, nickelas well as the noble metals platinum, palladium, osmium, ruthenium, andrhodium and any sulfides, oxides, nitrides, or phosphides thereof aswell as any alloys or combinations thereof. In one or more exemplaryembodiments, the catalytic metal is a base metal selected from the groupof vanadium, chromium, molybdenum, tungsten, cobalt, nickel, platinumand palladium.

The catalytic proppant can have one or more uniform or non-uniform outercoatings of one or more catalytic metals. The coating of catalytic metalcan cover or coat any suitable portion of the surface of the proppantsupport. In one or more exemplary embodiments, the coating of catalyticmetal can cover at least about 10%, at least about 15%, at least about20%, at least about 30%, at least about 40%, or at least about 50% ofthe surface of the proppant support. In one or more exemplaryembodiments, the coating of catalytic metal can cover less than about100%, less than about 99%, less than about 95%, less than about 90%,less than about 85%, less than about 80%, less than about 75%, less thanabout 65%, less than about 50%, less than about 40%, or less than about35% of the surface of the proppant support. In one or more exemplaryembodiments, about 25%, about 30%, about 35%, or about 45% to about 55%,about 65%, about 75%, about 85%, about 90%, about 95%, or about 99% ormore of the surface of the proppant support can be covered by thecatalytic metal. For example, the coating of catalytic metal can coverfrom about 10% to about 99%, from about 15% to about 95%, from about 20%to about 75%, from about 25% to about 65%, from about 30% to about 45%,from about 35% to about 75%, from about 45% to about 90%, or from about40% to about 95% of the surface of the proppant support.

The catalytic metal coating can have any suitable thickness. In one ormore exemplary embodiments, the catalytic metal coating can have anaverage thickness ranging from about 5 nm, about 10 nm, about 25 nm,about 50 nm, about 100 nm, or about 200 nm to about 300 nm, about 400nm, about 500 nm, about 750 nm, about 1,000 about 1,500 nm, about 2,000nm, or about 5,000 nm. For example, the average thickness of thecatalytic metal coating can be from about 400 nm to about 1,000 nm, fromabout 200 nm to about 600 nm, or from about 100 nm to about 400 nm.

In one or more exemplary embodiments, the proppant support can betreated with the catalytic metal by infusing the catalytic metal intoone or more pores and/or one or more channels of the proppant support.In one or more exemplary embodiments, the proppant support can betreated with the catalytic metal by coating the catalytic metal onto theone or more pores and/or one or more channels of the proppant support.For example, the catalytic metal can be applied as a coating on thewalls of pores and channels contained in the internal porous structure,also referred to herein as “pore walls.”

In one or more exemplary embodiments, the coating of the catalytic metalcan cover at least 0.1%, at least about 1%, at least about 2%, at leastabout 5%, at least about 7%, at least at least about 10%, at least about20%, at least about 35%, at least about 50%, at least about 65%, atleast about 75%, at least about 85%, or at least about 95% of the outersurfaces of the pore walls. The catalytic metal can cover, for example,100% of the outer surfaces of the pore walls of the proppant support.

In one or more exemplary embodiments, the catalytic metal coating cancover less than 100%, less than 99%, less than 95%, less than 90%, lessthan 85%, less than 80%, less than 75%, less than 65%, less than 50%,less than 40%, or less than 35% of the outer surfaces of the pore walls.In one or more exemplary embodiments, about 25%, about 30%, about 35%,or about 45% to about 55%, about 65%, about 75%, about 85%, about 90%,about 95%, or about 99% or more of the outer surface of the pore wallscan be covered by the catalytic metal. For example, the catalytic metalcoating can cover from about 10% to about 99%, from about 15% to about95%, from about 20% to about 75%, from about 25% to about 65%, fromabout 30% to about 45%, from about 35% to about 75%, from about 45% toabout 90%, or from about 40% to about 95% of the outer surface of thepore walls.

The catalytic proppant disclosed herein can be manufactured according toany suitable method. In one or more exemplary embodiments, the catalyticproppant is prepared by chemical precipitation, reverse precipitation,co-precipitation, incipient wetness, and sol-gel methods. In one or moreexemplary embodiments, methods for making the catalytic proppantdisclosed herein can include the methods for making catalysts disclosedin U.S. Pat. Nos. 2,908,654, 6,620,313, 6,635,599, and 7,541,310 andU.S. Pre-Grant Publication Nos. US 20050274646 and US 2007/0032692, eachof which are incorporated by reference in their entirety.

In at least one embodiment, a precursor compound of a catalytic metal isinfused into the proppant support. Precursor compounds include salts andzero valent compounds. Infusing a catalytic metal onto the proppantsupport can be performed by infusing the support with a solutioncontaining the catalytic metal or metal ion. Suitable solvents includewater and organic solvents (e.g., toluene, methanol, ethanol, and thelike). Those skilled in the art will be able to select the most suitablesolvent for a given catalyst material. The catalytic metal can be in theform of a salt of a catalytic metal or promoter element. Thus, onemethod of preparing a catalytic proppant is by incipient wetnessinfusing of the support with a solution of a soluble metal salt. In oneor more exemplary embodiments, incipient wetness infusing proceeds bysolution of a nickel compound in a minimal amount of solvent sufficientto fill the pores of the proppant support. Alternatively, the catalyticmetal can be in the form of a zero-valent compound. Thus, anotherpreferred method is to infuse the proppant support with a solution ofzero valent metal, such as cobalt carbonyl (e.g., Co₂(CO)₈, Co₄(CO)₁₂).

Another method of infusing includes infusing a proppant support with amolten salt of a catalytic metal. As used herein, the term “molten salt”refers to a salt that is in a liquid phase at elevated temperature, butis solid at standard temperature and pressure. One preferred methodcomprises infusing the support with a molten metal nitrate (e.g.,Co(NO₃)_(2.6)H₂O). A promoter compound can be infused into a proppantsupport in a separate step, independent of infusing the proppant supportwith the catalytic metal compound. Alternatively, a promoter compoundcan be infused simultaneously with the catalytic metal compound. Forexample, the promoter and catalytic metal compound can be infused from acommon solution.

Suitable nickel-containing precursor compounds include, for example,nickel sulfate (e.g., Ni(SO₄)₂.6H₂O), nickel nitrate, nickel chloride,nickel carbonyl, nickel acetate, and nickel oxalate. Suitablecobalt-containing precursor compounds include, for example, cobaltnitrate, cobalt carbonyl, cobalt acetate, cobalt acetyl acetonate,cobalt oxalate, and the like. Cobalt nitrate, cobalt carbonyl and cobaltnitrate hexahydrate are exemplary water-soluble, cobalt-containingprecursor compounds. Cobalt oxalate is soluble in acids or acidicsolutions. Cobalt acetate and cobalt acetyl acetonate are exemplary ofcobalt-containing precursor compounds soluble in organic solvents, suchas acetone and methanol.

Suitable water-soluble, rhenium-containing precursor compounds arepreferred and include, for example, perrhenic acid, ammonium perrhenate,rhenium pentacarbonyl chloride, rhenium carbonyl, and the like. Suitableruthenium-containing precursor compounds soluble in water include forexample ruthenium carbonyl, Ru(NH₃)₆Cl₃, Ru(III)2,4-pentanedionoate, andruthenium nitrosyl nitrate. Water-soluble ruthenium-containing precursorcompounds are preferred.

Suitable platinum-containing precursor compounds soluble in waterinclude, for example, platinum acetyl acetonate and Pt(NH₃)₄(NO₃)₂.Alternatively, the platinum-containing precursor can be soluble in anorganic solvent, such as platinum acetyl acetonate soluble in acetone.

Suitable boron-containing precursor compounds soluble in water include,for example, boric acid, sodium borate, sodium tetraborate, and disodiumtetraborate. Alternatively, the boron-containing precursor can besoluble in an organic solvent.

Suitable silver-containing precursor compounds soluble in water include,for example, silver nitrate (AgNO₃). Alternatively, thesilver-containing precursor silver acetate can be soluble in an organicsolvent.

Suitable palladium-containing precursor compounds include palladiumnitrate (Pd(NO₃)₂) and the like. Suitable palladium-containing precursorcompounds soluble in an organic solvent include palladium oxide (PdO),which is soluble in acetone.

The infused proppant support is preferably treated to form a treatedinfused proppant support. The treatment can include drying the infusedproppant support. Drying the infused proppant support preferably occursat a temperature between about 80 and about 150° C. Typically, dryingproceeds for from about 0.5 to about 24 hours at a pressure of betweenabout 0 and about 10 atm, more preferably between about 1 and about 5atm, still more preferably at about 1 atm.

Alternatively, or in combination, treating an infused proppant supportcan include calcining the infused support. The calcination can achieveoxidation of any compound or salt (coupled with the support material) toan oxide compound of the supported material. The calcination can proceedat a temperature between about 200° C. and about 800° C., morepreferably between about 275° C. and about 425° C., still morepreferably between about 300° C. and about 425° C. Calcination canproceed for an interval of time ranging from about 1 minute to about 24hours and at a pressure between about 0 atm and about 10 atm, morepreferably between about 1 atm and about 5 atm, still more preferably atabout 1 atm.

The infusion of a catalytic material (e.g., a catalytic metal) on/into aproppant support can proceed by multi-cycle infusion, such as by two,three, or four infusion cycles. Each infusion cycle can include infusionof the proppant support by any one or a combination of catalyticmaterials (e.g., catalytic metals) and subsequent drying and/orcalcining. In particular, each cycle of infusing the support to form aninfused proppant support can be followed by treating the infusedproppant support to form a treated infused proppant support. Thus, amulti-cycle infusion can include multiple cycles of drying and/orcalcination. Each subsequent cycle that includes drying can proceed at adifferent temperature from any earlier cycle of drying. Further, eachsubsequent cycle that includes calcination can proceed at a differenttemperature from any earlier cycle of calcination. By way of example andnot limitation, a multi-cycle infusion can include calcining the supportat a first temperature that is higher than the temperature forsubsequent calcinations.

The catalytic metal contained by a catalyst according to a preferredembodiment of the present disclosure is preferably in a reduced,metallic state before use of the catalytic proppant downhole. However,it will be understood that the catalytic metal can be present in theform of a metal compound such as a metal oxide, metal sulfide, or ametal hydroxide. The catalytic metal can be dispersed throughout theproppant support. It is also understood that the catalytic metal canalso be present at the surface of the proppant support, in particular onthe surface or within a surface region of the support, or that thecatalytic metal can be non-homogeneously dispersed onto the support.

The final treated catalytic proppant can be activated to form an activecatalyst by heating in a reducing gas. The activation preferablyachieves reduction of any oxide of the catalytic metal to a reducedstate. At least a portion of the metal(s) of the catalytic metalcomponent of the catalytic proppant can be present in a reduced state(i.e., in the metallic state). Reduction might not be necessary if thecatalyst is prepared with zero valent catalytic metal. In embodimentswhere hydrogen reduction is not performed, such as some embodiments thatinclude zero valent catalytic metal, the treatment of the infusedproppant support forms the active catalytic proppant.

In one or more exemplary embodiments, the catalytic proppant disclosedherein and its method of manufacture can be the electrically conductiveproppant and methods for making same, respectively, disclosed in U.S.Pat. No. 9,434,875 and U.S. Pre-Grant Publication Nos. US 2016/0069174,US 2016/0168452, and US 2016/0222283, each of which are incorporated byreference in their entirety.

In one or more exemplary embodiments, the catalytic proppant can alsoinclude one or more zeolitic materials. The zeolitic materials caninclude, but are not limited to, ZSM-5, ZSM-11, ZSM-12, ZSM-22, ZSM-23,ZSM-35, ZSM-57, mordenite, zeolite X, zeolite Y, SAPO-41, MCM-22,SAPO-17, SAPO-34 and SAPO-35. The surface activity of the zeolite can bemodified to be acidic, basic, or include rare earth elementalsubstitution to increase catalytic conversion activity. Methods for rareearth exchange can be seen, for example in U.S. Pat. Nos. 4,701,431,4,584,287, 3,676,368, each incorporated by reference herein in theirentirety.

The incorporation of zeolitic material can increase the surface area ofthe catalytic proppant. In one or more exemplary embodiments, thecatalytic proppant can have a surface area of about 100 m²/g to about300 m²/g when it contains a zeolitic material, such as about 125 m²/g toabout 275 m²/g, such as about 150 m²/g to about 250 m²/g, such as about175 m²/g to about 225 m²/g, for example about 200 m²/g.

The zeolitic material can be incorporated into and/or onto the proppantsupport in any suitable manner. In one or more exemplary embodiments, anaqueous slurry of raw kaolin, finely divided hydrated kaolin clay and/ormetakaolin, and pulverized, ultrafine kaolin that has been calcinedthrough its characteristic exotherm and sodium silicate binder isprepared. The aqueous slurry is then dried into green pellets and thencalcined and/or sintered in accordance with suitable proppantmanufacturing methods, including spray atomization, spray fluidization,spray drying, compressing, and drip-casting to obtain catalytic proppantcomprising a sodium silicate bonded mixture of hydrated kaolin and/ormetakaolin and the pulverized, ultrafine kaolin that has been calcinedat least substantially through its characteristic exotherm. Suitableproppant manufacturing methods include the methods described in U.S.Pat. Nos. 4,068,718, 4,427,068, 4,440,866, 5,188,175, 7,036,591,8,865,631, 8,883,693, 9,175,210 and 9,670,400, and U.S. PatentApplication Publication Nos. US 2016/0264853 and US 2016/0017214 theentire disclosures of which are incorporated herein by reference.

A quantity (e.g., about 3 to about 30% by weight of the kaolin) ofzeolite initiator may also be added to the aqueous slurry. As usedherein, the term “zeolite initiator” shall include any materialcontaining silica and alumina that either allows a zeolitecrystallization process that would not occur in the absence of theinitiator or shortens significantly the zeolite crystallization processthat would occur in the absence of the initiator. Such materials arealso known as “zeolite seeds.” The zeolite initiator may or may notexhibit detectable crystallinity by x-ray diffraction.

Adding zeolite initiator to the aqueous slurry of kaolin before it isspray dried into microspheres is referred to herein as “internalseeding”. Alternatively, zeolite initiator may be mixed with the kaolinmicrospheres after they are formed and before the commencement of thecrystallization process, a technique which is referred to herein as“external seeding”.

The zeolite initiator used in the present disclosure can be providedfrom a number of sources. For example, the zeolite initiator maycomprise recycled fines produced during the crystallization processitself. Other zeolite initiators that may be used include fines producedduring the crystallization process of another zeolite product or anamorphous zeolite initiator in a sodium silicate solution. As usedherein, “amorphous zeolite initiator” includes a zeolite initiator thathas little to no crystallinity as measured by x-ray diffraction. Theseeds can be prepared as disclosed by in U.S. Pat. No. 4,493,902.Especially preferred seeds are disclosed in U.S. Pat. No. 4,631,262.

The green pellets can be calcined directly, or alternativelyacid-neutralized to further enhance ion exchange of the catalystproppant after crystallization. The acid-neutralization processcomprises co-feeding uncalcined, green pellets and mineral acid to astirred slurry at controlled pH. The rates of addition of solids andacid can be adjusted to maintain a pH of about 2 to 7, most preferablyfrom about 2.5 to 4.5 with a target pH of about 3. The sodium silicatebinder can be gelled to silica and a soluble sodium salt, which can besubsequently filtered and washed free from the green pellets. The silicagel-bound green pellets are then calcined. In either case, calcinationis accomplished at a temperature and for a time sufficient to converthydrated kaolin components of the green pellets to metakaolin, leavingthe previously calcined kaolin components of the green pelletsessentially unchanged. The resulting calcined green pellets comprise amixture of metakaolin and kaolin clay calcined through itscharacteristic exotherm in which the two types of calcined kaolin arepresent in the same green pellets. Most preferably, the calcined greenpellets comprise metakaolin and kaolin that has been calcined throughits characteristic exotherm or any appropriate calcined aluminum sourceas previously described, in a weight ratio of metakaolin to calcinedaluminum source of about 1:1 or greater, preferably about 1.25:1 orgreater. Also present is Na₂O and SiO₂ derived from sodium silicatebinder.

Y-faujasite is allowed to crystallize by mixing the calcined greenpellets with the appropriate amounts of other constituents (including atleast sodium silicate and water), as known in the art, and then heatingthe resulting slurry to a temperature and for a time (e.g., to 200°−215°F. for 10-24 hours) sufficient to crystallize at least about 50% byweight, preferably at least about 70% by weight, Y-faujasite in thecalcined green pellets. Crystallization of zeolite Y is discussed inU.S. Pat. Nos. 5,023,220 and 4,493,902, the entire contents of which areherein incorporated by reference.

In one or more exemplary embodiments, the catalytic proppant disclosedherein can be manufactured in accordance with the methods disclosed inU.S. Pat. Nos. 3,367,886, 5,395,809, 6,656347, and 6,942,784, each ofwhich are incorporated by reference in their entirety.

In one or more exemplary embodiments, the catalytic proppant can bemixed with any conventional, or non-catalytic, proppant to provide aproppant mixture.

In one or more exemplary embodiments, a refinery catalyst can be mixedwith any non-catalytic proppant to provide a catalytic proppant pack.For example, a refinery catalyst can be admixed with a non-catalyticproppant prior to being pumped downhole. The refinery catalyst caninclude any known FCC catalysts, hydroprocessing catalysts,hydrotreating catalysts, hydrocracking catalysts, hydrogenationcatalysts, hydroisomerization catalysts, hydrorefining catalysts,hydrodemetallization catalysts, catalytic reforming catalysts, steamreforming catalysts, adsorbents, shift catalysts, or a mixture orcombination thereof.

The FCC catalyst can include any typical FCC catalysts, such as thoseproduced and sold by BASF, W.R. Grace and Company, Honeywell UOP, andAlbemarle Corporation. In one or more exemplary embodiments, the FCCcatalysts include any suitable zeolitic material. Zeolitic materialincludes ZSM-5, ZSM-11, ZSM-12, ZSM-22, ZSM-23, ZSM-35, ZSM-57,mordenite, zeolite X, zeolite Y, SAPO-41, MCM-22, SAPO-17, SAPO-34 andSAPO-35.

The zeolitic material can be included on any suitable FCC catalyst. Thematrix of the base FCC catalyst can include clays, modified clays,and/or silica. Exemplary clays include kaolin (a layered silicate havingthe chemical composition Al₂Si₂O₅(OH)₄), montmorillonite (a hydratedsodium calcium aluminum magnesium hydroxide having the chemicalstructure (Na;Ca)_(0.33)(Al;Mg)₂Si₄O₁₀(OH)₂.nH₂O, and bentonite(aluminum phyllosilicate). The base catalyst matrix can also includeinorganic porous oxides, such as alumina, silica, magnesia, andsilica-alumina. The base FCC catalyst can have a bulk density of betweenabout 0.5 g/ml and about 1 g/ml, an average particle diameter of betweenabout 50 microns and about 100 micron, and a pore volume of betweenabout 0.05 mL/g and about 0.5 mL/g. The support material can be amontmorillonite clay having a surface area of between about 50 and about350 m²/g, and which has been calcined to a temperature of at least about550° C.

The hydroprocessing, hydrotreating, hydrocracking, hydrogenation,hydroisomerization, hydrorefining, and hydrodemetallization catalystscan include any typical catalysts, such as those produced and sold byBASF, W.R. Grace and Company, Honeywell UOP, Haldor Topsoe, JohnsonMathey and Albemarle Corporation. In one or more exemplary embodiments,the hydroprocessing catalysts can include a metal component on a supportmaterial. The metal component can include a Group VIB metal component ora Group VIII metal component, or both metal components. Thehydroprocessing catalyst can include both a Group VIB metal componentand a Group VIII metal component. The hydroprocessing catalyst can alsoinclude a promoter such as a phosphorous component.

The Group VIII metal component of the hydroprocessing catalystcomposition can be those Group VIII metal or metal compounds that, incombination with the other components of the catalyst composition,suitably provide a hydroprocessing catalyst. The Group VIII metal can beselected from the group of nickel, cobalt, palladium and platinum. TheGroup VIII metal component contained in the hydroprocessing catalystcomposition can be in the elemental form or in the form of a metalcompound, such as, for example, oxides or sulfides. The amount of GroupVIII metal in the hydroprocessing catalyst composition can be in therange of from about 0.1 about 6 weight percent elemental metal based onthe total weight of the hydroprocessing catalyst composition.

The Group VIB metal component of the hydroprocessing catalystcomposition can be those Group VIB metal or metal compounds that, incombination with the other elements of the hydroprocessing catalystcomposition, suitably provide a hydroprocessing catalyst. The Group VIBmetal can be selected from the group of chromium, molybdenum andtungsten. The Group VIB metal component contained in the hydroprocessingcatalyst composition can be in the elemental form or in the form of ametal compound, such as, for example, oxides or sulfides. The amount ofGroup VIB metal in the hydroprocessing catalyst composition can be inthe range of from about 5 to about 25 weight percent elemental metalbased on the total weight of the hydroprocessing catalyst composition.

The support material of the hydroprocessing catalyst can be any materialthat suitably provides a support for the metal hydrogenation componentsof the hydroprocessing catalyst including porous refractory oxides.Examples of possible suitable porous refractory oxides include silica,magnesia, silica-titania, zirconia, silica-zirconia, titania,titania-alumina, zirconia-alumina, silica-titania, alumina,silica-alumina, and alumino-silicate. The alumina can be of variousforms, such as, alpha alumina, beta alumina, gamma alumina, deltaalumina, eta alumina, theta alumina, boehmite, or mixtures thereof. Theporous refractory oxide generally has an average pore diameter in therange of from about 50 Angstroms to about 200 Angstroms, preferably,from about 70 Angstroms to about 175 Angstroms, and, most preferably,from about 80 Angstroms to about 150 Angstroms. The total pore volume ofthe porous refractory oxide, as measured by standard mercury porosimetrymethods, is in the range of from about 0.2 cc/gram to about 2 cc/gram.Preferably, the pore volume is in the range of from about 0.3 cc/gram toabout 1.5 cc/gram, and, most preferably, from about 0.4 cc/gram to about1 cc/gram. The surface area of the porous refractory oxide, as measuredby the B.E.T. method, generally exceeds about 100 m²/gram, and it istypically in the range of from about 100 to about 400 m²/gram.

The catalytic reforming catalysts include catalysts comprising one ormore metals, preferably a metal selected from the group of Pt, Ir, Re,Ru, Sn and Pd, and a variety of supports, preferably a support selectedfrom the group of alumina, silica, silica-alumina zeolites, chloridedalumina, fluorided alumina, and bromided alumina. Also, the catalyticreforming catalyst can be a metallic-acidic bifunctional one wherein onetype of catalytic site is metallic and another is an acidic non-metallicsite. Examples of suitable catalytic reforming catalysts are describedin the U.S. Pat. Nos. 3,134,732, 3,781,219, 4,594,145, and 4,897,177,which are incorporated herein by reference herein in their entirety.

The adsorbent can include molecular sieves, silica gel, Y-type zeolite,X-type zeolite, activated carbon, or activated alumina, or anycombination thereof. The steam reforming catalyst can include a shiftcatalyst such as an iron-chromium high temperature shift catalyst, acopper/zinc oxide low temperature shift catalyst, or both.

In one or more exemplary embodiments, the catalytic proppant can bemixed with one or more proppant particulates containing a chemicaltreatment agent to provide the proppant mixture. These chemicaltreatment agent containing proppant particulates can contain thechemical treatment agents in any suitable manner. In one or moreexemplary embodiments, the one or more chemical treatment agents aredisposed on, attached to, coated on, infused/impregnated into, combinedwith, or otherwise contained on or in the chemical treatment agentcontaining proppant particulates. Suitable chemical treatment agentsinclude any one or more of tracers, scale inhibitors, hydrateinhibitors, hydrogen sulfide scavenging materials, corrosion inhibitors,paraffin or wax inhibitors, including ethylene vinyl acetate copolymers,asphaltene inhibitors, organic deposition inhibitors, biocides,demulsifiers, defoamers, gel breakers, salt inhibitors, oxygenscavengers, iron sulfide scavengers, iron scavengers, clay stabilizers,enzymes, biological agents, flocculants, naphthenate inhibitors,carboxylate inhibitors, nanoparticle dispersions, surfactants,combinations thereof, or any other oilfield chemical that can be helpfulin a hydraulic fracturing process.

In one or more exemplary embodiments, the chemical treatment agentincludes any one or more demulsifying agents. The demulsifying agentscan include condensation polymers of alkylene oxides and glycols, suchas ethylene oxide and propylene oxide condensation polymers ofdi-propylene glycol as well as trimethylol propane; and alkylsubstituted phenol formaldehyde resins, bis-phenyl diepoxides, andesters and diesters of same. The demulsifying agents can also includeoxyalkylated phenol formaldehyde resins, oxyalkylated amines andpolyamines, di-epoxidized oxyalkylated polyethers, poly triethanolaminemethyl chloride quaternary, melamine acid colloid, and aminomethylatedpolyacrylamide.

In one or more exemplary embodiments, the chemical treatment agentincludes any one or more corrosion inhibitors. Suitable corrosioninhibitors can include, but are not limited to, fatty imidazolines,alkyl pyridines, alkyl pyridine quaternaries, fatty amine quaternariesand phosphate salts of fatty imidazolines. In one or more exemplaryembodiments, the chemical treatment agent includes any one or moresuitable foaming agents. Suitable foaming agents can include, but arenot limited to, oxyalkylated sulfates or ethoxylated alcohol sulfates,or mixtures thereof. In one or more exemplary embodiments, the chemicaltreatment agent includes any one or more suitable oxygen scavengers.Suitable oxygen scavengers can include triazines, maleimides,formaldehydes, amines, carboxamides, alkylcarboxyl-azo compoundscumine-peroxide compounds morpholino and amino derivatives morpholineand piperazine derivatives, amine oxides, alkanolamines, aliphatic andaromatic polyamines.

In one or more exemplary embodiments, the chemical treatment agentincludes any one or more paraffin inhibitors. Suitable paraffininhibitors can include, but are not limited to, ethylene/vinyl acetatecopolymers, acrylates (such as polyacrylate esters and methacrylateesters of fatty alcohols), and olefin/maleic esters. In one or moreexemplary embodiments, the chemical treatment agent can include any oneor more asphaltene inhibitors. Suitable asphaltene inhibitors caninclude fatty ester homopolymers and copolymers (such as fatty esters ofacrylic and methacrylic acid polymers and copolymers) and sorbitanmonooleate.

The chemical treatment agent containing proppant disclosed herein caninclude the chemical treatment agent containing proppant compositionsand methods for making same disclosed in U.S. Pre-Grant Publication Nos.US 2014/0262247, US 2016/0032177, US 2016/0075941, and 2016/0186050,each of which are incorporated by reference herein in their entirety.

Also disclosed herein are downhole catalytic refining processesutilizing the catalytic proppant disclosed herein as catalysts. Thedownhole catalytic refining processes can include, but are not limitedto, hydroprocessing, hydrotreating, hydrocracking, hydrogenation,hydroisomerization, hydrorefining, hydrodemetallization, catalyticcracking, reforming reactions, shift reactions, dehydration, anddehydrogenation. The catalytic refining process can occur or operate indownhole conditions. The downhole conditions can include a temperatureof about 100° F. to about 300° F. or more, such as about 125° F. toabout 275° F., such as about 150° F. to about 250° F., such as about175° F. to about 200° F., such as about 225° F., and a fluid pressure ofabout 1,000 psi to about 7,500 psi or more, such as about 1,500 psi toabout 5,000 psi, such as about 2,000 psi to about 4,000 psi, such asabout 2,500 psi to about 3,500 psi, such as about 3,000 psi. In the caseof hydroprocessing, hydrotreating, hydrocracking, hydrogenation,hydroisomerization, hydrorefining, hydrodemetallization, reformingreactions, hydrogen can be produced downhole from the catalytic proppantand/or the hydrogen can be injected downhole from the surface. Forexample, hydrogen can be produced at the surface of catalytically-activeproppant via a steam reforming reaction and then can diffuse intoneighboring trapped hydrocarbons to be utilized in a hydrocrackingreaction with higher molecular weight hydrocarbon compounds.Hydrocracking downhole can lower the viscosity of the produced fluid,thereby increasing productivity of the wellbore. Similarly, hydrogen canreact with heteroatom-containing hydrocarbons to provide volatileheteroatom-containing compounds such as H₂S, H₂O, NH₃, NO, NO₂, SO₂,etc. and a refined hydrocarbon composition. The produced refinedhydrocarbon compositions can have a reduced sulfur content, a reducednitrogen content, a reduced oxygen content, and/or a reduced metalscontent when compared to the hydrocarbons contained in the formation. Inone or more exemplary embodiments, any hydrogen produced downhole by thecatalytic proppant can be collected and purified.

FIG. 1 is a schematic cross-sectional illustration of a well 100containing two hydraulically-induced fractures 102, each containingcatalytic proppant 104. In one or more exemplary embodiments, asubterranean fluid 108 is present in the hydraulically-induced fractures102. The subterranean fluid 108 can contact the catalytic proppant 104under downhole conditions to provide a refined product 110 having one ormore of a lower molecular weight, a reduced sulfur content, a reducednitrogen content, a reduced oxygen content, a reduced metals content, ora lower viscosity. The refined product 110 can be produced at thesurface of the well 100.

While the present disclosure has been described in terms of severalexemplary embodiments, those of ordinary skill in the art will recognizethat embodiments can be practiced with modification within the spiritand scope of the appended claims.

The present disclosure has been described relative to a severalexemplary embodiments. Improvements or modifications that becomeapparent to persons of ordinary skill in the art only after reading thisdisclosure are deemed within the spirit and scope of the application. Itis understood that several modifications, changes and substitutions areintended in the foregoing disclosure and in some instances some featuresof the present disclosure will be employed without a corresponding useof other features. Accordingly, it is appropriate that the appendedclaims be construed broadly and in a manner consistent with the scope ofthe present disclosure.

What is claimed is:
 1. A catalytic proppant particle, comprising: aproppant support comprising silica and alumina, the proppant supporthaving a macropore concentration of about 15% to about 45%, a mesoporeconcentration of about 20% to 50%, and a micropore concentration ofabout 8% to about 30% based on the total pore volume of the proppantsupport, and a surface area of about 0.5 m²/g to about 50 m²/g; and acatalyst.
 2. The catalytic proppant particle of claim 1, wherein thecatalytic proppant particle has a long term permeability at 7,500 psi ofat least about 10 D in accordance with ISO 13503-5.
 3. The catalyticproppant particle of claim 1, wherein the catalyst is a catalytic metaldeposited on or distributed within the proppant support.
 4. Thecatalytic proppant particle of claim 1, further comprising a zeoliticmaterial deposited on or distributed within the proppant support.
 5. Aproppant composition comprising a mixture of the catalytic proppant ofclaim 1 and a non-catalytic proppant.
 6. A method of hydraulicfracturing a subterranean formation, comprising: injecting a hydraulicfluid into a subterranean formation at a rate and pressure sufficient toopen a fracture therein; and injecting a fluid containing a proppantcomposition into the fracture, the proppant composition comprising: aplurality of particulates; and at least one particulate of the pluralityof particulates comprising: a catalyst; and a proppant supportcomprising silica and alumina, the proppant support having a macroporeconcentration of about 15% to about 45%, a mesopore concentration ofabout 20% to 50%, and a micropore concentration of about 8% to about 30%based on the total pore volume of the proppant support, and a surfacearea of about 0.5 m²/g to about 50 m²/g.
 7. A method of gravel packing awellbore, comprising: introducing a fluid containing a proppantcomposition into a gravel pack region of a wellbore, the proppantcomposition comprising: a plurality of particulates; and at least oneparticulate of the plurality of particulates comprising: a catalyst; anda proppant support comprising silica and alumina, the proppant supporthaving a macropore concentration of about 15% to about 45%, a mesoporeconcentration of about 20% to 50%, and a micropore concentration ofabout 8% to about 30% based on the total pore volume of the proppantsupport, and a surface area of about 0.5 m²/g to about 50 m²/g.
 8. Amethod of frac-packing a wellbore, comprising: introducing a fluidcontaining a proppant composition into a frac-pack region of a wellbore,the proppant composition comprising: a plurality of particulates; and atleast one particulate of the plurality of particulates comprising: acatalyst; and a proppant support comprising silica and alumina, theproppant support having a macropore concentration of about 15% to about45%, a mesopore concentration of about 20% to 50%, and a microporeconcentration of about 8% to about 30% based on the total pore volume ofthe proppant support, and a surface area of about 0.5 m²/g to about 50m²/g.